Improvement in countersinks



IL VETERS. PMOTOUTHOGHAFNER, WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

DELAY F. SUTTON,

OF TOLEDO, OHIO.

IMPROVEMENT IN COUNTERSINKS.

Specification forming part of Letters Patent No. 109,154, dated November 8, 1870.

ble countersink, as will be hereinafter fully set forth.

In order to enable others skilled in the art 4to which my invention appertains to make and use the same., I will'now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure 1 is a side View of my countersink complete. Fig. 2 is a plan View of the upper end without the nut. Fig. 3 is a side view of the saine, and Fig. 4 is a plan view of the nut.

A represents a tube of suitable length, at the lower end of which are formed two round lip-cutters, B B. From the upper end downward the tube A is slotted, as shown, and at the upper end is formed a tapering screw, C.

D represents a nut made to iit the screw C.

The bit or giinletis passed through the tube A, so that the cutters B B will be any desired distance from the point. The nut l) is then turned down on the screw, which tightens it rinly.

The countersink thus constructed is very substantial, and not liable to get out of order.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

The slotted tube A, provided with the round lip-cutters B B at one end and tapering screw C at the slotted end, and used with the nutD, substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I 'have hereunto set my hand this 4th day ,of

October, 1870. A

DELAY F. SUTTON.

Witnesses:

FRANK COLLINS, C. L. EVERT. 

